Method for determining friction coefficient between wheel and driving surface in vehicle, involves setting corrected friction coefficient to local maximum of raw value until friction coefficient reaches another maximum

摘要

#CMT# #/CMT# The method involves determining a corrected friction coefficient (Muef) from a raw value (Mueesp) determined from sensor signals. A local maximum is determined in distribution of the raw value. The corrected friction coefficient is set to the local maximum of the raw value until the friction coefficient reaches another local maximum. A difference between a plausiblized friction coefficient and the corrected friction coefficient is subjected to a filtering process. A filtered value is subtracted from the plausiblized friction coefficient. #CMT#USE : #/CMT# Method for determining a friction coefficient between a wheel and a driving surface using a closed-loop and/or open-loop control device of a driving dynamic control system i.e. electronic stability program control system, in a vehicle (all claimed). #CMT#ADVANTAGE : #/CMT# The corrected friction coefficient is set to the local maximum of the raw value until the friction coefficient reaches another local maximum, thus determining the friction coefficient between the wheel and the driving surface with high security. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic representation of a system for determining a friction coefficient between a wheel and a driving surface. ay : Lateral acceleration bMueValid : Logical flag f : Function Mueesp : Raw value Muef : Friction coefficient.